Windshield heating wire laying method and device and electronic equipment

Abstract

The invention relates to a method and device for arranging a windshield heating wire and electronic equipment, and the method comprises the steps: segmenting a windshield wiring region, and obtaining a plurality of wiring units and the specific position of each wiring unit in the windshield wiring region; traversing to obtain at least one initial wiring scheme under the condition that each wiring unit comprises one heating wire and the two ends of the heating wire in each wiring unit can be connected with the heating wires in other wiring units or the power interface of the windshield wiring area by combining the windshield wiring area and the preset number of the heating wires; and selecting a scheme in which the number of the wiring units generating magnetic offset among the wiring units is the most from at least one initial wiring scheme as a final wiring scheme. According to the invention, the light passing through the windshield wiring area is not influenced by the magnetic induction material, so that the imaging of the windshield wiring area is clear, and the situation that a program frequently prompts a user to clean the windshield due to the unclear collected image is avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a method and device for arranging windshield heating wires, and electronic equipment. Background Art

[0002] As the functions of vehicles continue to increase, the application scenarios of vehicle cameras are gradually increasing. For example, in assisted driving scenarios, it is necessary to obtain road images through vehicle cameras to determine road information. In addition, in assisted driving scenarios, it is necessary to ensure that the road images obtained are clear.

[0003] Some vehicle-mounted cameras are installed in the vehicle cabin, and light can only be collected by the vehicle-mounted camera after it passes through the windshield. Considering the heating and defrosting requirements of the windshield, heating wires are arranged on the windshield. However, the heating wires arranged on the windshield will affect the accuracy of the image collected by the camera. For example, when the heating wires are energized, a magnetic field is generated, and the windshield contains magnetic materials. The properties of the magnetic materials change, and the magnetic materials move in the windshield, affecting the transmission of light and causing image blur. Therefore, how to avoid the above problems by changing the wiring method of the heating wires has become an urgent problem to be solved. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a method, a device and an electronic device for arranging windshield heating wires.

[0005] In a first aspect, the present disclosure provides a method for laying out a windshield heating wire, comprising:

[0006] Segmenting the windshield wiring area according to a preset segmentation pattern to obtain a plurality of wiring units and a specific position of each wiring unit in the windshield wiring area;

[0007] In combination with the windshield wiring area and the preset number of heating wires, at least one initial wiring scheme is obtained by traversing under the condition that each wiring unit contains a heating wire and both ends of the heating wire in each wiring unit can be connected to the heating wires in other wiring units or the power interface of the windshield wiring area;

[0008] A scheme with the largest number of wiring units that produce magnetic cancellation between the wiring units is selected from at least one of the initial wiring schemes as a final wiring scheme.

[0009] In some embodiments, before segmenting the windshield wiring area according to the preset segmentation pattern, the method further includes:

[0010] Determine a core area of ​​vision mapped by a camera onto the windshield;

[0011] Determining an actual heating wire prohibited area of ​​the windshield based on the visual field core area and / or the maximum prohibited area of ​​the windshield;

[0012] The windshield wiring area is determined based on the actual heating wire prohibited area.

[0013] In some embodiments, determining the core area of ​​the field of view mapped by the camera to the windshield includes:

[0014] Obtaining the field of view angle of the camera and the relative position of the camera and the windshield to determine the maximum field of view of the windshield;

[0015] An area in the maximum visual field range that is an image processing target is determined as the visual field core area.

[0016] In some embodiments, obtaining the field of view angle of the camera includes:

[0017] Obtain the number and size of pixels of the camera, as well as an image height angle mapping table;

[0018] The field of view of the camera is determined based on the number and size of pixels of the camera and the image height angle mapping table.

[0019] In some embodiments, the step of determining the area in the maximum field of view as the image processing object as the field of view core area further includes:

[0020] The area to be image processed is determined according to the required critical field of view and pixel density range.

[0021] In some embodiments, before determining the actual heating wire prohibited area of ​​the windshield based on the visual field core area and / or the maximum prohibited area of ​​the windshield, the method further includes:

[0022] The maximum prohibited area of ​​the windshield is determined based on the heat conduction rate of the windshield, the set temperature increase range of the windshield, and the power per unit length of the heating wire to be laid.

[0023] In some embodiments, determining the actual heating wire prohibited area of ​​the windshield based on the visual field core area and / or the maximum prohibited area of ​​the windshield includes:

[0024] If the visual field core area is smaller than or equal to the maximum prohibited area of ​​the windshield, determining the visual field core area as the actual heating wire prohibited area of ​​the windshield;

[0025] If the core area of ​​the field of view is larger than the maximum forbidden area of ​​the glass, determining that the area corresponding to the maximum forbidden area of ​​the windshield is the area corresponding to the actual heating wire forbidden area of ​​the windshield;

[0026] The redrawn area is determined based on the area corresponding to the maximum prohibited area of ​​the windshield and the optical center projected by the camera onto the windshield, and the redrawn area is determined to be the actual heating wire prohibited area of ​​the windshield.

[0027] In some embodiments, it also includes:

[0028] Determining the arrangement spacing of the heating wires based on the current flowing through the heating wires when the heating wires are heated and the heat generated by the heating wires;

[0029] The preset segmentation pattern is determined based on the heating wire arrangement spacing.

[0030] In some embodiments, the initial wiring scheme includes:

[0031] In the windshield wiring area, heating wires are arranged in an area where the distance to the edge of the heating wire prohibited area is greater than or equal to the heating wire arrangement spacing.

[0032] In some embodiments, it also includes:

[0033] A heating wire is arranged in the windshield wiring area inside the windshield.

[0034] In some embodiments, the initial wiring scheme includes:

[0035] The heating wires are arranged in the windshield wiring area in an overlapping wiring manner, wherein the overlapping wiring manner is to arrange an even number of heating wires with opposite current flows along the same track in at least one wiring unit in the windshield wiring area.

[0036] In a second aspect, the present disclosure further provides a windshield heating wire arrangement device, comprising:

[0037] A wiring unit determination module, used to segment the windshield wiring area according to a preset segmentation pattern to obtain a plurality of wiring units and a specific position of each wiring unit in the windshield wiring area;

[0038] An initial wiring scheme determination module is used to combine the windshield wiring area and the preset number of heating wires, and traverse to obtain at least one initial wiring scheme under the condition that each wiring unit contains a heating wire and both ends of the heating wire in each wiring unit can be connected to the heating wires in other wiring units or the power interface of the windshield wiring area;

[0039] The final wiring scheme determination module is used to select a scheme with the largest number of wiring units that generate magnetic cancellation between the wiring units from at least one of the initial wiring schemes as the final wiring scheme.

[0040] In a third aspect, the present disclosure further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method for laying out the windshield heating wire provided in any one of the first aspects are implemented.

[0041] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0042] The present disclosure provides a method for laying out the windshield heating wire, comprising: dividing the windshield wiring area according to a preset segmentation pattern to obtain a plurality of wiring units and the specific position of each wiring unit in the windshield wiring area; combining the windshield wiring area and the preset number of heating wires, traversing to obtain at least one initial wiring scheme under the condition that each wiring unit contains a heating wire, and both ends of the heating wire in each wiring unit can be connected to the heating wire in other wiring units or the power interface of the windshield wiring area; selecting the scheme with the largest number of wiring units that generate magnetic cancellation between each wiring unit from at least one initial wiring scheme as the final wiring scheme. Thus, the windshield wiring area is divided to obtain a plurality of wiring units, and wiring is performed in each wiring unit to ensure that each position of the windshield wiring area can receive the heat generated by the heating wire when heating, so as to achieve a better heating effect. When the heating wire is energized, a magnetic field will be generated, and the windshield contains magnetic induction materials. The magnetic induction materials are affected by the current, which will cause the magnetic field characteristics of the magnetic induction materials to change. The magnetic induction materials move in the windshield, affecting the transmission of light and causing image blur. Therefore, under the condition that each wiring unit contains a heating wire, the wiring method of the heating wire in the wiring unit is changed, such as the extension direction and number of the heating wire, to obtain at least one initial wiring scheme. Under different initial wiring schemes, the number of wirings that produce magnetic cancellation between each wiring unit is different, and the scheme with the largest number of wiring units that produce magnetic cancellation is selected as the final wiring scheme. Under this wiring scheme, the magnetic field generated by each wiring unit in the windshield wiring area is the smallest, thereby weakening or eliminating the influence of the magnetic field on the magnetically sensitive material in the glass body. The embodiment of the present disclosure can prevent the light passing through the windshield wiring area from being affected by the magnetically sensitive material, so that the imaging of the windshield wiring area is clear, and avoid the program frequently prompting the user to clean the windshield due to unclear captured images. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 A schematic diagram of a process of laying out a windshield heating wire provided in an embodiment of the present disclosure;

[0046] Figure 2 A schematic diagram of the structure of a windshield wiring area with a preset segmentation pattern provided in an embodiment of the present disclosure;

[0047] Figure 3 A partial wiring diagram of an initial solution provided by an embodiment of the present disclosure;

[0048] Figure 4-Figure 6 A partial wiring diagram of another initial solution provided by an embodiment of the present disclosure;

[0049] Figure 7 A schematic diagram of the structure of a heating wire provided in an embodiment of the present disclosure;

[0050] Figure 8 A cross-sectional schematic diagram of a windshield provided in an embodiment of the present disclosure;

[0051] Fig. 9 A structural block diagram of a windshield heating wire arrangement device provided in an embodiment of the present disclosure;

[0052] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0055] An embodiment of the present disclosure provides a method for laying out windshield heating wires. The method for laying out windshield heating wires can be applied in the scenario of laying out heating wires on vehicle glass. The method can be performed by a windshield heating wire laying device provided by an embodiment of the present disclosure. Figure 1A schematic diagram of a process for laying out a windshield heating wire according to an embodiment of the present disclosure is shown in FIG. Figure 1 As shown, the method for arranging the windshield heating wire includes S110 to S130.

[0056] S110, segmenting the windshield wiring area according to a preset segmentation pattern to obtain a plurality of wiring units and a specific position of each wiring unit in the windshield wiring area.

[0057] The windshield is provided with a windshield wiring area, which is the area on the vehicle windshield where heating wires can be arranged. The heating wires are arranged on the windshield wiring area to provide heat to the windshield for defrosting and defogging. The windshield has certain heating requirements, and the heat generated by the heating wires should be able to provide sufficient heat for any position in the windshield wiring area to avoid too little heat, which cannot effectively defrost and defog, and affect the user's line of sight. Therefore, in order to enable each position on the windshield wiring area to receive sufficient heat, a preset segmentation image is provided, and the windshield wiring area is segmented by the preset segmentation pattern, thereby obtaining multiple wiring units and the specific position of each wiring unit in the windshield wiring area. Among them, since the wiring unit is obtained based on the preset segmentation image, the shape and size of the preset segmentation image and the wiring unit are consistent.

[0058] For example Figure 2 , Figure 2 A structural schematic diagram of a windshield wiring area based on a preset segmentation pattern provided in an embodiment of the present disclosure, wherein the preset segmentation pattern 10 is set to a square, and only some wiring units 20 on the windshield wiring area are provided as an example in the figure. The shapes and sizes of the 16 wiring units 20 are consistent with the preset segmentation image, and the heating wires can be subsequently laid in the wiring units.

[0059] It should be noted that the embodiment of the present disclosure does not set any restrictions on the shape and size of the preset segmentation pattern, which can be set according to actual needs. Figure 2 This is just an example.

[0060] S120. In combination with the windshield wiring area and the preset number of heating wires, traverse to obtain at least one initial wiring scheme while satisfying the requirement that each wiring unit contains a heating wire and both ends of the heating wire in each wiring unit can be connected to the heating wires in other wiring units or the power interface of the windshield wiring area.

[0061] Based on step S110, multiple wiring units and wiring unit positions in the windshield wiring area are obtained, and multiple initial wiring schemes are obtained in combination with the preset number of heating wires. In the embodiment of the present disclosure, in order to ensure that each position in the windshield wiring area can receive the heat generated by the heating wire when heated, and can meet the heat demand of the position, and achieve a better heating effect, a heating wire is arranged in each wiring unit to maximize the wiring units in the windshield wiring area, and both ends of the heating wire in each wiring unit can be connected to the heating wire in other wiring units or the power interface of the windshield wiring area, so as to be controlled by the power control module.

[0062] The amount of heat required by the windshield is a certain value, so the total amount of heat required to be provided by the heating wire can be determined. In order to make the heating more uniform, the wiring should be as uniform as possible. For example, multiple wiring units are set up, each of which contains a heating wire. This can ensure that the number of wiring units in the windshield wiring area is maximized so that heating wires are present at all locations. Avoid too many heating wires in a wiring unit, which results in too much heat being provided, while other wiring units do not have heating wires, resulting in uneven heat distribution, which affects the heating effect.

[0063] In the embodiment of the present disclosure, the preset number of heating wires can be set according to actual needs, for example, the preset number of heating wires is one, and each heating wire is composed of at least one heating wire connected. That is, one heating wire is set in a wiring unit, and multiple wiring units have multiple heating wires, and multiple heating wires are connected to form a preset heating wire.

[0064] If the preset number of heating wires is one, the power control module controls the heating of this preset heating wire. The two ends of the heating wire are respectively connected to the positive and negative power interfaces of the windshield wiring area so as to be electrically connected to the power control module. The heating wires in each wiring unit are on this heating wire. The positive and negative power interfaces of the windshield wiring area are electrically connected to the power control module. For example, Figure 3 A partial wiring diagram of an initial solution provided by an embodiment of the present disclosure, Figure 4-Figure 6 A partial wiring diagram of another initial solution provided by the embodiment of the present disclosure. Figure 3-6 As shown, the preset segmentation pattern 10 is set to a square. The figure only provides an example of a part of the wiring units 20 on the windshield wiring area and the heating wires 30 located in the wiring units. Each wiring unit includes a heating wire, and multiple heating wires form a heating wire.

[0065] In some optional embodiments, the number of preset heating wires is two, and the power control module controls the heating of the two preset heating wires. Then both ends of the two heating wires are respectively connected to the positive and negative power supply interfaces of the windshield wiring area. Among them, the heating wire in each wiring unit is on any one of the heating wires.

[0066] There are multiple wiring methods for the heating wire in each wiring unit. The wiring methods of each wiring unit can be different, or the wiring methods of some wiring units are the same, or the wiring methods of each wiring unit are the same. The wiring method can refer to the direction and shape of the wiring, for example, there are straight wiring methods, wavy wiring methods, etc., which are not limited in the present disclosure. Therefore, when the above requirements are met, multiple wiring methods are traversed to obtain at least one initial wiring scheme.

[0067] S130 , selecting a solution with the largest number of wiring units that produce magnetic cancellation between wiring units from at least one initial wiring solution as a final wiring solution.

[0068] Since the glass contains magnetic materials, the magnetic materials are affected by the magnetic field generated by the current, which will cause the magnetic field characteristics of the magnetic materials to change, and the magnetic materials move in the windshield, affecting the transmission of light and causing blurred images. The heating of the heating wire will generate a magnetic field, which will in turn affect the transmission of light. To avoid this, the magnetic field generated by the heating wire in the windshield wiring area should be eliminated. Therefore, from at least one initial wiring scheme, the scheme with the largest number of wiring units that generate magnetic cancellation between each wiring unit is selected as the final wiring scheme.

[0069] Among them, if the magnetic field generated by the heating wire in one wiring unit can offset the magnetic field generated by the heating wire in another wiring unit, then the two wiring units are magnetically offset wiring units. For example, if the heating wires in two adjacent wiring units are parallel to each other and the currents flowing in the heating wires are in opposite directions, then the magnetic fields generated by the two are opposite, and the two wiring units are magnetically offset wiring units.

[0070] The more wiring units that cancel magnetic fields, the smaller the magnetic field generated in the windshield wiring area, the smaller the impact on the magnetic sensitive material in the glass body, and the possibility of the magnetic sensitive material moving in the windshield is reduced to ensure the normal transmission of light, so that the light passing through the windshield wiring area is not affected by the magnetic sensitive material, and the image of the windshield wiring area is clear. Therefore, the solution with the largest number of wiring units that produce magnetic cancellation between each wiring unit is selected as the final wiring solution.

[0071] The embodiment of the present disclosure divides the windshield wiring area to obtain multiple wiring units, and the wiring is performed in each wiring unit to ensure that each position of the windshield wiring area can receive the heat generated by the heating wire when it is heated, so as to achieve a better heating effect. When the heating wire is energized, a magnetic field will be generated. The windshield contains magnetic induction materials. The magnetic induction materials are affected by the current, which will cause the magnetic field characteristics of the magnetic induction materials to change. The magnetic induction materials move in the windshield, affecting the transmission of light and causing image blur. Therefore, under the condition that each wiring unit contains a heating wire, the wiring method of the heating wire in the wiring unit is changed, such as the extension direction and number of the heating wires, to obtain at least one initial wiring scheme. Under different initial wiring schemes, the number of wirings that generate magnetic cancellation between each wiring unit is different, and the scheme with the largest number of wiring units that generate magnetic cancellation is selected as the final wiring scheme. Under this wiring scheme, the magnetic field generated by each wiring unit in the windshield wiring area is the smallest, thereby weakening or eliminating the influence of the magnetic field on the magnetic induction material in the glass body. The embodiment of the present disclosure can prevent the light passing through the windshield wiring area from being affected by the magnetic induction material, so that the imaging of the windshield wiring area is clear, and avoid frequent prompts from the program to the user to clean the windshield due to unclear collected images.

[0072] In some embodiments, before segmenting the windshield wiring area according to the preset segmentation pattern, the method further includes:

[0073] Determine the core area of ​​the camera's field of view mapped onto the windshield.

[0074] The camera mentioned in the disclosed embodiment is arranged in the vehicle cabin. When the camera collects road images, the light will penetrate the windshield and illuminate the imaging device of the camera, and the camera imaging device forms an image through photoelectric induction. In order to prevent the heating wire from affecting the transmission of light, resulting in unclear images collected by the camera, the heating wire may be prohibited in the area where the light penetrates the windshield and is collected by the camera. This part of the area is also the core area of ​​the field of view mapped by the camera on the windshield. The lens size, shape, material and camera pixels of different cameras are different. Therefore, different cameras have different corresponding imaging areas, and the situations in which the camera is affected by the position of the heating wire to collect the effect are different. Therefore, it is necessary to determine the core area of ​​the field of view mapped by the camera on the windshield. The core area of ​​the field of view is the main imaging area corresponding to the camera, and it is also the area where the light is most affected by the heating wire.

[0075] Based on the core area of ​​the field of vision and / or the maximum prohibited area of ​​the windshield, the actual heating wire prohibited area of ​​the windshield is determined.

[0076] Combining the above steps, we can get the core area of ​​the camera's field of view projected onto the windshield. Before wiring the windshield, we also need to consider the area on the windshield where heating wires are prohibited. Since the heating wires are set on the windshield to meet the heating, defrosting and defogging functions of the windshield, the heat generated by the heating wires can remove obstacles such as frost, fog or ice on the windshield that block the view due to low temperature. Therefore, the heat generated by the arranged heating wires should meet the heat requirements of the windshield.

[0077] If the area where the heating wires are laid is small, less heat will be generated, and the heat that the heating wires can provide to the windshield will also be reduced accordingly, which is not conducive to defrosting and defogging. In order to ensure the effect of defrosting and defogging, the heat generated in the area where the heating wires are laid should meet the heat demand of the windshield, so a maximum prohibited area can be set on the windshield. The area where the heating wires are not laid should not exceed the range of the maximum prohibited area to avoid the heat generated by the heating wires being too low. The maximum prohibited area is the maximum area on the windshield where heating wires are prohibited from being laid, and the core area of ​​the field of view is the corresponding main imaging area obtained by the camera projecting onto the windshield. Therefore, based on the core area of ​​the field of view and the maximum prohibited area of ​​the windshield, the actual heating wire prohibited area of ​​the windshield is determined.

[0078] In some optional embodiments, the actual heating wire prohibited area of ​​the windshield can also be determined based on the core area of ​​the field of view, and the wiring is mainly to avoid the imaging area when the camera collects images. Optionally, the actual heating wire prohibited area of ​​the windshield is determined based on the maximum prohibited area of ​​the windshield, and the heat demand of the heating wire is mainly ensured. The embodiments of the present disclosure do not limit this, and it can be set according to actual needs.

[0079] Based on the actual heating wire prohibited area, determine the windshield wiring area.

[0080] Based on the actual heating wire prohibited area obtained, the area outside the actual heating wire prohibited area on the windshield can be determined as the windshield wiring area. Laying heating wires on the windshield wiring area will not affect the core area of ​​the camera's field of view. The process of light passing through the windshield and being collected by the camera will not be affected by the heating wires. The camera can capture clear images, and the heat provided by the heating wires can also meet the heat requirements of the windshield.

[0081] For example, Figure 7 A schematic diagram of the structure of a heating wire provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, a windshield 1, an actual heating wire prohibited area 2 and a heating wire 30 are provided. Figure 3The wiring unit is not shown. Due to the different number of on-board cameras installed inside the vehicle, the actual heating wire prohibited area 2 may include multiple areas. The actual heating wire prohibited area 2 provided in the figure exemplarily includes two areas, and the area outside the actual heating wire prohibited area 2 is the heating wire wiring area, and the heating wire 3 is arranged in the heating wire wiring area. It is forbidden to lay heating wires in the actual heating wire prohibited area 2, which is also the imaging area corresponding to the on-board camera, so as to obtain clear road image information.

[0082] In the method for laying out the windshield heating wires provided in an embodiment of the present disclosure, in order to prevent light from passing through the windshield and being refracted by the heating wires, causing dark patterns to appear in the imaging area corresponding to the camera, resulting in recognition errors during image processing, the present disclosure first determines the core area of ​​the field of view of the camera mapped onto the windshield, that is, the imaging area corresponding to the camera. If the heating wires are laid out within this range, it will have a greater impact on the clarity of the image captured by the camera.

[0083] In addition, the smaller the area where the heating wire is laid on the windshield, the less heat the heating wire can provide to the windshield. The windshield has a certain heat requirement, and the total heat generated by the heating wire cannot be too small, otherwise it cannot be effectively defrosted and defogged. Therefore, the area where the heating wire is prohibited is limited, that is, there is a maximum prohibited area. Combining the core area of ​​the field of view and the maximum prohibited area, the actual area on the windshield where the heating wire is prohibited and the windshield wiring area can be determined, and the heating wire can be laid in the windshield wiring area to prevent the heating wire from appearing in the imaging area corresponding to the camera.

[0084] In some embodiments, determining a core area of ​​the field of view mapped by the camera onto the windshield includes:

[0085] Obtain the camera's field of view angle and the relative position of the camera and the windshield to determine the maximum field of view of the windshield.

[0086] The area in the maximum visual field range that is the target of image processing is determined as the visual field core area.

[0087] In the process of determining the core area of ​​the field of view, it is first necessary to obtain the field of view angle of the camera and the relative position of the camera and the windshield to obtain the maximum field of view of the windshield. Among them, the field of view angle of the camera (the angle formed by the two edges of the maximum range of the camera lens) determines the field of view of the camera. The larger the field of view angle, the larger the field of view. The camera is fixed in the car, and the relative position of the camera and the windshield needs to be considered. For example, the relative position of the camera and the windshield includes the distance between the camera and the windshield, the angle of the windshield and other parameters, which will affect the area range mapped by the camera on the windshield. For example, if the windshield is parallel to the camera lens, and the camera is far away from the windshield, the maximum field of view of the camera mapped to the windshield is larger. If the camera is close to the windshield, the maximum field of view of the camera mapped to the windshield is smaller.

[0088] Since the maximum field of view of the camera is not entirely the effective field of view, for example, images collected from the edge of the maximum field of view may be invalid data and will not be used by the vehicle. Therefore, after determining the maximum field of view of the windshield, it is also necessary to determine the area in the maximum field of view that corresponds to image processing as the core field of view. The images collected in the core field of view are the data required by the vehicle, and the core field of view is also the main area that should be avoided from being affected by the heating wire.

[0089] In some embodiments, obtaining the field of view angle of the camera includes:

[0090] Get the number and size of pixels of the camera, as well as the image height angle mapping table.

[0091] The camera's field of view is determined based on the number and size of the camera's pixels and the image height angle mapping table.

[0092] In the disclosed embodiment, the pixel size on the image sensor in the camera can be determined by obtaining the number and size of the pixels of the camera, and the image height angle mapping table corresponding to the camera lens can be obtained. The camera field of view angles corresponding to different pixel scales on the image height angle mapping table are different, and the camera field of view angle can be obtained by looking up the image height angle mapping table according to the pixel size. Among them, the image height angle mapping table can be obtained in advance according to the material of the camera lens and the distance between the lens and the image sensor, so the camera field of view angle can be directly confirmed on the image height angle mapping table based on the number and size of the pixels of the camera.

[0093] It should be noted that the camera's field of view angle can also be obtained in other ways. For example, the camera's field of view angle is also related to the imaging plane characteristics. Therefore, the curvature, thickness, position, material and other related parameters of the camera lens can be obtained, and the camera's field of view angle can be calculated and confirmed in combination with the distance between the lens and the camera's image sensor. The embodiments of the present disclosure do not limit the specific implementation method for obtaining the camera's field of view angle, which can be obtained according to actual needs. The above embodiments are only used as examples.

[0094] In some embodiments, determining the area in the maximum field of view as the image processing object as the field of view core area may also include: determining the area as the image processing object according to the required key field of view and pixel density range.

[0095] In the disclosed embodiment, it is also necessary to determine the area corresponding to the corresponding image processing, because not all images acquired within the maximum field of view of the camera are valid images, and some invalid images exist. Invalid images may be at the edge of the image or in areas with low pixel density, and invalid images cannot provide the data information required by the vehicle. Therefore, when processing images, the vehicle will process them according to the valid images, and the area corresponding to the valid images is the area as the image processing object. The area as the image processing object within the maximum field of view can be determined as the field of view core area.

[0096] The area used as the object of image processing can be determined based on the key field of view required to be obtained when the vehicle processes the image and the pixel density range of the camera, wherein the required key field of view is the part that needs to be processed when the vehicle processes the image, for example, the key field of view is the central area directly in front of the camera. The field of view corresponding to the central area is the required key field of view to avoid deviations in the position of the acquired image. Secondly, it is also necessary to combine the pixel density range. The pixel density of the camera will affect the recognition accuracy and long-distance recognition. The larger the pixel density, the higher the recognition accuracy and the longer the recognition distance, while the smaller the pixel density, the lower the recognition accuracy and the relatively close recognition distance. The pixel density range corresponding to the camera can be determined according to the image acquisition requirements of the corresponding camera so as to collect the required image. Therefore, the area used as the object of image processing is determined according to the required key field of view and the pixel density range.

[0097] In some embodiments, before determining the actual heating wire prohibited area of ​​the windshield based on the core area of ​​the field of vision and / or the maximum prohibited area of ​​the windshield, the following steps may also be included:

[0098] The maximum prohibited area of ​​the windshield is determined based on the heat conduction rate of the windshield, the set temperature increase range of the windshield, and the power per unit length of the heating wire to be laid.

[0099] In the disclosed embodiment, it is necessary to determine the maximum prohibited area of ​​the windshield, and the heating wire is arranged outside the maximum prohibited area of ​​the windshield. The purpose of the heating wire is to provide heat to the windshield. The heat provided by the heating wire should meet the heat demand of the windshield, otherwise it will affect the defrosting and defogging effect of the heating wire. The larger the maximum prohibited area of ​​the windshield, the smaller the area on the windshield where the heating wire can be arranged, and the heat provided by the heating wire will also be reduced accordingly. Therefore, it is necessary to determine the maximum prohibited area of ​​the windshield to avoid affecting the heating effect of the heating wire.

[0100] Among them, the maximum prohibited area of ​​the windshield is related to various factors such as the heat conduction rate of the windshield, the set temperature increase range of the windshield, and the power per unit length of the heating wire to be laid. Specifically, the heat conduction rate will be different for different materials of the windshield, which will affect the speed and time of heat transfer; and the temperature of the windshield after the increase is different, and the heat generated will also be different. The higher the temperature, the greater the heat generated. However, in order to avoid the windshield temperature being too high and affecting the safety of the user, the temperature increase range will be set for the windshield. The different power per unit length of the heating wire will also affect the heat generated. The higher the power, the greater the heat generated, and the lower the power, the less heat generated. Therefore, based on the heat conduction rate of the windshield, the set temperature increase range of the windshield, and the power per unit length of the heating wire to be laid, which are related to the heat generation and heat transfer of the heating wire, it is possible to determine the area where the heating wire needs to be laid when the heat generated by the heating wire meets the heat demand of the windshield, and then determine the maximum prohibited area of ​​the windshield.

[0101] It should be noted that the maximum no-clothing area of ​​the windshield is also related to the heating time of the heating wire. The longer the heating time, the more heat is generated, and the shorter the heating time, the less heat is generated. Therefore, if a larger maximum no-clothing area is required, the heating time of the heating wire can also be increased.

[0102] In some embodiments, based on the core area of ​​the field of vision and / or the maximum prohibited area of ​​the windshield, determining the actual prohibited area of ​​the heating wire of the windshield includes:

[0103] If the core area of ​​the visual field is smaller than or equal to the maximum prohibited area of ​​the windshield, the core area of ​​the visual field is determined to be the actual prohibited area of ​​the heating wires of the windshield.

[0104] In the embodiment of the present disclosure, the core area of ​​the field of view mapped by the camera onto the windshield is the main imaging area of ​​the camera. The images acquired within this range are relatively clear. The maximum prohibited area of ​​the windshield, that is, the maximum area on the windshield where heating wires are prohibited from being laid. If the area where heating wires are prohibited from being laid exceeds the maximum prohibited area, the heating wires cannot provide sufficient heat for the windshield. Therefore, the final actual heating wire prohibited area needs to be combined with the core area of ​​the field of view mapped by the camera onto the windshield and the maximum prohibited area of ​​the windshield.

[0105] The core area of ​​the field of view mapped by the camera onto the windshield is compared with the size of the maximum prohibited area of ​​the windshield. If the core area of ​​the field of view is less than or equal to the maximum prohibited area of ​​the windshield, in order to ensure the clarity of the image obtained by the camera, the core area of ​​the field of view can be directly determined as the actual heating wire prohibited area of ​​the windshield, and heating wires are prohibited from being laid in the core area of ​​the field of view, and will not exceed the range of the maximum prohibited area.

[0106] If the core area of ​​the field of vision is larger than the maximum forbidden area of ​​the glass, it is determined that the area corresponding to the maximum forbidden area of ​​the windshield is the area corresponding to the actual heating wire forbidden area of ​​the windshield.

[0107] The redrawn area is determined based on the area corresponding to the maximum prohibited area of ​​the windshield and the optical center projected onto the windshield by the camera, and the redrawn area is determined to be the actual heating wire prohibited area of ​​the windshield.

[0108] If the core area of ​​the field of view is larger than the maximum prohibited area of ​​the windshield, the core area of ​​the field of view cannot be determined as the actual prohibited area of ​​the heating wire of the windshield, otherwise it will exceed the maximum prohibited area and the heating wire cannot provide enough heat for the windshield. Instead, the area corresponding to the maximum prohibited area of ​​the windshield should be determined as the area corresponding to the actual prohibited area of ​​the heating wire of the windshield. The redrawn area is determined based on the area corresponding to the maximum prohibited area of ​​the windshield and the optical center projected onto the windshield by the camera. The optical center on the windshield should be at the center of the redrawn area to avoid deviations in the angle of the acquired image and determine that the redrawn area is the actual prohibited area of ​​the heating wire of the windshield.

[0109] For example, if the redrawn area is set to be a circle, the optical center of the windshield is the center of the circle, and the area corresponding to the maximum prohibited area of ​​the windshield is the circular area, then the specific position of the redrawn area on the windshield can be obtained, and the redrawn area can be determined as the actual heating wire prohibited area of ​​the windshield. The redrawn area can also adopt other shapes, and the present disclosure does not limit this.

[0110] It should be noted that the maximum prohibited area provided in the embodiment of the present disclosure is the maximum prohibited area of ​​the windshield for laying heating wires obtained by combining the material of the heating wire and the set heating time. When the core area of ​​the field of vision is larger than the maximum prohibited area of ​​the windshield, the heat demand of the windshield needs to be considered at this time, and the area of ​​the prohibited area cannot be increased indefinitely, otherwise the defrosting and defogging functions cannot be completed.

[0111] In some embodiments, it also includes:

[0112] Determine the spacing of the heating wires based on the current flowing through the heating wires and the heat generated by the heating wires when the heating wires are heated;

[0113] The preset segmentation pattern is determined based on the heating wire layout spacing.

[0114] In the disclosed embodiment, the windshield includes magnetic induction materials, such as metal ions, which are beneficial to the windshield's energy absorption protection, sound insulation, radiation protection, heat insulation and other functions. When the surrounding magnetic field intensity changes to a certain intensity, the magnetic induction material's properties will change, such as the movement of metal ions, which will change the light transmission characteristics. For example, the light passing through the windshield will be affected by the magnetic induction material, changing the transmission path, and the light will be refracted by the magnetic induction material, causing a virtual image to appear in the imaging area of ​​the camera. Therefore, it should be avoided that the magnetic field intensity changes to a certain intensity, causing the magnetic induction material's properties to change, resulting in changes in the light transmission characteristics, affecting the camera's acquisition of a clear image. In addition, because the heating wire will generate a current during the heating process due to power-on, and there will be a magnetic field around the current, so in the process of laying the heating wire, it is necessary to separate the adjacent heating wires by a certain distance to avoid the heating wires being too close, the magnetic field intensity is large, resulting in changes in the magnetic induction material's properties and changes in the light transmission characteristics. The heat generated by the heating wire can meet the heat demand of the windshield within a certain range. If the heat generated by the heating wire cannot meet the heat demand of the windshield within this range, the defogger and defrost effect will be poor. Therefore, the maximum distance allowed between adjacent heating wires should also be determined based on the heat generated by the heating wires to ensure that the windshield can be heated evenly. Therefore, the spacing of the heating wires can be determined based on the current when the heating wires are heated and the heat generated by the heating wires to avoid the above situation.

[0115] The heating wire is arranged in the wiring unit, and there is one heating wire in each wiring unit. The heating wire can provide the required heat for the corresponding wiring unit. The wiring unit is obtained according to the preset segmentation pattern, and the wiring unit is the same as the preset segmentation pattern. Combined with the obtained heating wire arrangement spacing, the side length of the preset segmentation pattern can be determined, that is, the heating wire arrangement spacing is the side length of the preset segmentation pattern. When the side length of the preset segmentation pattern is the heating wire arrangement spacing, the magnetic field generated between the heating wires is the smallest, and at the same time, the heat demand of the area where each heating wire is located can be met, so that the windshield wiring area can be heated evenly. Therefore, the preset segmentation pattern can be determined, and the wiring unit obtained by dividing the windshield wiring area with the preset segmentation pattern can meet the above heating requirements.

[0116] Optionally, if the heating wire layout spacing is fixed due to the current during heating, but the heat generated by the heating wire cannot meet the heat demand of the windshield wiring area, the resistance value (thickness) of the heating wire and the resistance wire material ρ can be adjusted to change the heat generated by the heating wire.

[0117] In some embodiments, the inner interlayer of the windshield includes a magnetically sensitive material that changes light transmission characteristics under the action of a magnetic field; and the heating wire is arranged in the windshield wiring area, including:

[0118] Route the heating wires in the windshield routing area on the inside of the windshield.

[0119] In the disclosed embodiment, the windshield includes an inner interlayer, and the inner interlayer includes a magnetic induction material that changes the light transmission characteristics under the action of a magnetic field. The presence of the inner interlayer makes the windshield less likely to break, thereby improving the safety of the windshield. When the windshield has an interlayer, in order to reduce the influence of the magnetic field generated by the current of the heating wire on the magnetic induction material in the inner interlayer, the heating wire can be kept away from the magnetic induction material. For example, Figure 3 A cross-sectional schematic diagram of a windshield provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the embodiment of the present disclosure provides a windshield, including an outer layer of glass 11 and an inner layer of glass 12, an inner interlayer 13 is located between the outer layer of glass 11 and the inner layer of glass 12, and a magnetic induction material (not shown in the figure) is located in the inner interlayer 13. When the heating wire 30 is arranged, the heating wire 30 can be arranged on the inner side of the inner layer of glass 12, that is, the inner side of the entire windshield, so as to avoid direct contact between the magnetic induction material and the heating wire, and reduce the influence of the magnetic field generated by the current of the heating wire on the magnetic induction material, thereby ensuring that the imaging area corresponding to the camera will not refract light due to the movement of the magnetic induction material, so that the image obtained by the camera will not produce a ghost image. In addition, because the outer side of the windshield will be in contact with the external environment, rain and snow will fall on the windshield, and wipers are often used to clean the outer side of the windshield. If the heating wire is arranged in the windshield wiring area on the outer side of the windshield, it is easy to affect the service life of the heating wire. Therefore, the heating wire is arranged in the windshield wiring area on the inner side of the windshield.

[0120] In some embodiments, the initial wiring scheme includes:

[0121] The heating wires are arranged in the windshield wiring area by using overlapping wiring, wherein the overlapping wiring method is to arrange an even number of heating wires with opposite current flows along the same track in at least one wiring unit in the windshield wiring area.

[0122] Since the windshield includes magnetic induction materials, when the surrounding magnetic field strength changes to a certain strength, the properties of the magnetic induction materials will change, and the metal ions will move, which will change the light transmission characteristics. For example, the light passing through the windshield will be affected by the magnetic induction materials, changing the transmission path, and the light will be refracted by the magnetic induction materials, causing virtual images to appear in the camera's imaging area. The current of the heating wire will induce a magnetic field, and the heating process of the heating wire may cause the properties of the magnetic induction materials to change, causing the light transmission characteristics to change, affecting the camera's ability to obtain clear images.

[0123] Therefore, by adjusting the layout of the heating wires, the influence of the magnetic field on the magnetically sensitive material is weakened. For example, when laying out the heating wires in the windshield wiring area, an overlapping wiring method can be adopted, and an even number of heating wires with opposite current flows are laid out along the same trajectory in at least one wiring unit in the windshield wiring area to offset the influence of the magnetic field. Because the directions of the magnetic fields generated by the heating wires with opposite current flows are also opposite, when there are an even number of heating wires, an even number of pairs of magnetic fields with opposite directions will be generated, and the tracks of the heating wires are the same, the currents are the same, and the magnetic field strengths generated should also be the same. Therefore, the even number of pairs of magnetic fields with opposite directions and the same strength will cancel each other out, thereby weakening the influence of the magnetic field on the magnetically sensitive material, and will not change the light transmission characteristics, ensuring that the imaging area corresponding to the camera will not produce ghost images, and a clear image can be obtained. For example, if two heating wires are set, the currents of the two heating wires flow in opposite directions to offset the influence of the magnetic field; or if four heating wires are set, the currents of two heating wires flow in the same direction and the currents of the other two heating wires flow in the opposite direction; or 2n heating wires are set, of which the currents of n heating wires flow in the same direction and the currents of the other n heating wires flow in the opposite direction.

[0124] Regarding the method for laying out the windshield heating wires provided in the embodiment of the present disclosure, the embodiment of the present disclosure also provides a device for laying out the windshield heating wires. Fig. 9 A structural block diagram of a windshield heating wire arrangement device provided in an embodiment of the present disclosure, such as Fig. 9 As shown, the control device includes: a wiring unit determination module 41, an initial wiring plan determination module 42 and a final wiring plan determination module 43.

[0125] The wiring unit determination module 41 is used to segment the windshield wiring area according to a preset segmentation pattern to obtain multiple wiring units and the specific position of each wiring unit in the windshield wiring area. The initial wiring scheme determination module 42 is used to combine the windshield wiring area and the preset number of heating wires, and traverse to obtain at least one initial wiring scheme under the condition that each wiring unit contains a heating wire and both ends of the heating wire in each wiring unit can be connected to the heating wire in other wiring units or the power interface of the windshield wiring area. The final wiring scheme determination module 43 is used to select the scheme with the largest number of wiring units that produce magnetic cancellation between each wiring unit from at least one initial wiring scheme as the final wiring scheme.

[0126] The windshield heating wire laying device disclosed in the above embodiments can execute the windshield heating wire laying method disclosed in the above embodiments, and has the same or corresponding beneficial effects, which will not be described again here to avoid repetition.

[0127] The present disclosure also provides an electronic device, Fig.10 A schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure is shown in FIG. Fig.10 As shown, it includes a memory 51 and a processor 52. The memory 51 stores a computer program. When the processor 52 executes the computer program, the steps of the method for arranging the windshield heating wire as described in any of the above embodiments are implemented.

[0128] Optionally, the windshield obtained according to the method for arranging windshield heating wires provided in the embodiment of the present disclosure may further include: a detection module and a power control module.

[0129] The detection module, the power control module and the heating wire are electrically connected respectively. The detection module is used to detect the working parameters generated during the heating process of the heating wire and send them to the power control module. The power control module receives the working parameters and controls to turn off the heating function of the heating wire when the working parameters exceed the set threshold. Among them, the working parameters at least include temperature. For example, the detection module includes a temperature sensor, which detects the temperature of the heating wire on the windshield in real time through the temperature sensor. When the detected temperature exceeds the set temperature threshold, the power control module controls to turn off the heating function of the heating wire to avoid the windshield temperature being too high and scalding the user. The set temperature threshold can be obtained through simulation calculation. For example, during the simulation process, the highest temperature point of each temperature monitoring point of the windshield is positioned as the set temperature threshold, or temperature compensation is performed by calibrating the average hot spot. The embodiment of the present disclosure does not limit this. The working parameters can also be set to other parameters, such as current, voltage, power, etc. The specific method will not be repeated.

[0130] When a vehicle is equipped with an on-board camera, the dew point formula can be used to calculate the temperature of the inner surface of the glass in the sealed or semi-sealed area of ​​the on-board front-view camera and the relative humidity in the sealed or semi-sealed area of ​​the front-view camera. When there is a risk of fogging, the heating wire can be turned on in advance to avoid fogging.

[0131] Specifically, the saturated vapor pressure calculation formula is:

[0132] P=10^((AB / (T+C))*133.32237;

[0133] Where P is the saturated vapor pressure, T is the temperature, and A, B, and C are all constants;

[0134] When T is between 60 and 150°C, A=7.96681, B=1668.21, C=228; when T<60°C, A=8.10765, B=1750.286, C=235.

[0135] The formula for calculating water vapor pressure is: e = RH*p;

[0136] e = RH*P;

[0137] Where e is the vapor pressure of water vapor, RH is the relative humidity, and P is the saturated vapor pressure at the current temperature.

[0138] The dew point temperature calculation formula is:

[0139]

[0140] Where Tdew is the dew point temperature, e is the water vapor pressure, A, B, and C are constants;

[0141] When T is between 60 and 150°C, A=7.96681, B=1668.21, C=228; when T<60°C, A=8.10765, B=1750.286, C=235, e is the vapor pressure of water vapor, and the dew point temperature Tdew can be obtained according to the above formula, and the defog step can be performed in advance according to the dew point temperature and actual needs.

[0142] It can be understood that the memory in this embodiment can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. In some embodiments, the memory stores the following elements: executable units or data structures, or their subsets, or their extended sets of operating systems and applications. In the embodiment of the present disclosure, the processor executes the steps of each embodiment of the method for arranging the windshield heating wire provided in the embodiment of the present disclosure by calling the program or instruction stored in the memory.

[0143] The method for laying out the windshield heating wire provided in the embodiment of the present disclosure can be applied to a processor or implemented by a processor. The processor can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The above processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0144] The steps of the method for arranging the windshield heating wire provided in the embodiment of the present disclosure can be directly embodied as being executed by a hardware decoding processor, or being executed by a combination of hardware and software units in the decoding processor. The software unit can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the method in combination with its hardware.

[0145] The electronic device may also include one physical component, or multiple physical components, according to the instructions generated by the processor when executing the method for laying out the windshield heating wire provided in the embodiment of the present disclosure. Different physical components may be set inside the electronic device, or outside the electronic device, such as a cloud server, etc. Each physical component cooperates with the processor and the memory to realize the functions of the electronic device in this embodiment.

[0146] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0147] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for laying out a windshield heating wire, characterized in that: include: Segmenting the windshield wiring area according to a preset segmentation pattern to obtain a plurality of wiring units and a specific position of each wiring unit in the windshield wiring area; In combination with the windshield wiring area and the preset number of heating wires, at least one initial wiring scheme is obtained by traversing under the condition that each wiring unit contains a heating wire and both ends of the heating wire in each wiring unit can be connected to the heating wires in other wiring units or the power interface of the windshield wiring area; A scheme with the largest number of wiring units that produce magnetic cancellation between the wiring units is selected from at least one of the initial wiring schemes as a final wiring scheme.

2. The method for laying out the windshield heating wire according to claim 1, characterized in that: Before segmenting the windshield wiring area according to the preset segmentation pattern, the method further includes: Determine a core area of ​​vision mapped by a camera onto the windshield; Determining an actual heating wire prohibited area of ​​the windshield based on the visual field core area and / or the maximum prohibited area of ​​the windshield; The windshield wiring area is determined based on the actual heating wire prohibited area.

3. The method for laying out the windshield heating wire according to claim 2, characterized in that: The determining the core area of ​​the field of view mapped by the camera onto the windshield includes: Obtaining the field of view angle of the camera and the relative position of the camera and the windshield to determine the maximum field of view of the windshield; An area in the maximum visual field range that is an image processing target is determined as the visual field core area.

4. The method for laying out the windshield heating wire according to claim 3, characterized in that: The obtaining the field of view angle of the camera includes: Obtain the number and size of pixels of the camera, as well as an image height angle mapping table; The field of view of the camera is determined based on the number and size of pixels of the camera and the image height angle mapping table.

5. The method for laying out the windshield heating wire according to claim 3, characterized in that: The step of determining the area in the maximum visual field range as the image processing object as the visual field core area further includes: The area to be image processed is determined according to the required key field of view and pixel density range.

6. The method for laying out the windshield heating wire according to claim 2, characterized in that: Before determining the actual heating wire prohibited area of ​​the windshield based on the visual field core area and / or the maximum prohibited area of ​​the windshield, the method further includes: The maximum prohibited area of ​​the windshield is determined based on the heat conduction rate of the windshield, the set temperature increase range of the windshield, and the power per unit length of the heating wire to be laid.

7. The method for laying out the windshield heating wire according to claim 2, characterized in that: The determining of the actual heating wire prohibited area of ​​the windshield based on the visual field core area and / or the maximum prohibited area of ​​the windshield includes: If the visual field core area is smaller than or equal to the maximum prohibited area of ​​the windshield, determining the visual field core area as the actual heating wire prohibited area of ​​the windshield; If the core area of ​​the field of view is larger than the maximum forbidden area of ​​the glass, determining that the area corresponding to the maximum forbidden area of ​​the windshield is the area corresponding to the actual heating wire forbidden area of ​​the windshield; The redrawn area is determined based on the area corresponding to the maximum prohibited area of ​​the windshield and the optical center projected by the camera onto the windshield, and the redrawn area is determined to be the actual heating wire prohibited area of ​​the windshield.

8. The method for laying out the windshield heating wire according to claim 2, characterized in that: Also includes: Determining the arrangement spacing of the heating wires based on the current flowing through the heating wires when the heating wires are heated and the heat generated by the heating wires; The preset segmentation pattern is determined based on the heating wire arrangement spacing.

9. The method for laying out the windshield heating wire according to claim 8, characterized in that: The initial wiring scheme includes: In the windshield wiring area, heating wires are arranged in an area where the distance to the edge of the heating wire prohibited area is greater than or equal to the heating wire arrangement spacing.

10. The method for laying out the windshield heating wire according to claim 2, characterized in that: Also includes: A heating wire is arranged in the windshield wiring area inside the windshield.

11. The method for laying out windshield heating wires according to claim 1, characterized in that: The initial wiring scheme includes: The heating wires are arranged in the windshield wiring area in an overlapping wiring manner, wherein the overlapping wiring manner is to arrange an even number of heating wires with opposite current flows along the same track in at least one wiring unit in the windshield wiring area.

12. A windshield heating wire arrangement device, characterized in that: include: A wiring unit determination module, used to segment the windshield wiring area according to a preset segmentation pattern to obtain a plurality of wiring units and a specific position of each wiring unit in the windshield wiring area; An initial wiring scheme determination module is used to combine the windshield wiring area and the preset number of heating wires, and traverse to obtain at least one initial wiring scheme under the condition that each wiring unit contains a heating wire and both ends of the heating wire in each wiring unit can be connected to the heating wires in other wiring units or the power interface of the windshield wiring area; The final wiring scheme determination module is used to select a scheme with the largest number of wiring units that produce magnetic cancellation between the wiring units from at least one of the initial wiring schemes as the final wiring scheme.

13. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method for arranging windshield heating wires according to any one of claims 1 to 11 when executing the computer program.

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